<template>
  <w-dialog :border="false" closeFree width="600px" @ok="selectOk" :title="title" v-model="visible">
    <div class="picker">
      <div class="candidate" v-loading="loading">
        <div v-if="type !== 'role'">
          <el-input v-model="search" @input="searchUser" style="width: 95%;" size="small"
                    clearable placeholder="搜索人员，支持拼音、姓名" prefix-icon="el-icon-search"/>
          <div v-show="!showUsers">
            <ellipsis hoverTip style="height: 18px; color: #8c8c8c; padding: 5px 0 0" :row="1" :content="deptStackStr">
              <i slot="pre" class="el-icon-office-building"></i>
            </ellipsis>
            <div style="margin-top: 5px">
              <el-checkbox v-model="checkAll" @change="handleCheckAllChange" :disabled="!multiple">全选</el-checkbox>
              <span v-show="deptStack.length > 0" class="top-dept" @click="beforeNode">上一级</span>
            </div>
          </div>
        </div>
        <div class="role-header" v-else>
          <div>系统角色</div>
        </div>
        <div class="org-items" :style="type === 'role' ? 'height: 350px':''">
          <el-empty :image-size="100" description="似乎没有数据" v-show="orgs.length === 0"/>
          <div v-for="(org, index) in orgs" :key="index" :class="orgItemClass(org)" @click="selectChange(org)">
            <el-checkbox v-model="org.selected" :disabled="disableDept(org)"></el-checkbox>
            <div v-if="org.type === 'dept'">
              <i class="el-icon-folder-opened"></i>
              <span class="name">{{ org.name }}</span>
              <span @click.stop="nextNode(org)" :class="`next-dept${org.selected ? '-disable':''}`">
                <i class="iconfont icon-map-site"></i>下级
              </span>
            </div>
            <div v-else-if="org.type === 'user'" style="display: flex; align-items: center">
              <el-avatar :size="35" :src="org.avatar" v-if="$isNotEmpty(org.avatar)"/>
              <span v-else class="avatar">{{ getShortName(org.name) }}</span>
              <span class="name">{{ org.name }}</span>
            </div>
            <div style="display: inline-block" v-else>
              <i class="iconfont icon-bumen"></i>
              <span class="name">{{ org.name }}</span>
            </div>
          </div>
        </div>
      </div>

      <div class="selected">
        <div class="count">
          <span>已选 {{ select.length }} 项</span>
          <span @click="clearSelected">清空</span>
        </div>
        <div class="org-items" style="height: 350px;">
          <el-empty :image-size="100" description="请点击左侧列表选择数据" v-show="select.length === 0"/>
          <div v-for="(org, index) in select" :key="index" :class="orgItemClass(org)">
            <div v-if="org.type === 'dept'">
              <i class="el-icon-folder-opened"></i>
              <span style="position: static" class="name">{{ org.name }}</span>
            </div>
            <div v-else-if="org.type === 'user'" style="display: flex; align-items: center">
              <el-avatar :size="35" :src="org.avatar" v-if="$isNotEmpty(org.avatar)"/>
              <span v-else class="avatar">{{ getShortName(org.name) }}</span>
              <span class="name">{{ org.name }}</span>
            </div>
            <div v-else>
              <i class="iconfont icon-bumen"></i>
              <span class="name">{{ org.name }}</span>
            </div>
            <i class="el-icon-close" @click="noSelected(index)"></i>
          </div>
        </div>
      </div>
    </div>
  </w-dialog>
</template>

<script setup>
import {defineProps, computed, ref,defineExpose} from 'vue'
import WDialog from "./WDialog.vue";

const props = defineProps({
  title: {
    default: '请选择',
    type: String
  },
  type: {
    default: 'org', //org选择部门/人员  user-选人  dept-选部门 role-选角色
    type: String
  },
  multiple: { //是否多选
    default: false,
    type: Boolean
  },
  selected: {
    default: () => {
      return []
    },
    type: Array
  },
})
const visible = ref(false);
const loading = ref(false);
const checkAll = ref(false);
const nowDeptId = ref(null);
const isIndeterminate = ref(false);
const searchUsers = ref([]);
const nodes = ref([]);
const select = ref([]);
const search = ref('');
const deptStack = ref([]);



const deptStackStr = computed(() => {
  return String(deptStack.value.map(v => v.name)).replaceAll(',', ' > ');
})

const orgs = computed(() => {
  return !search.value || search.value.trim() === '' ? nodes : searchUsers;
})

const showUsers = computed(() => {
  return search.value || search.value.trim() !== '';
})

function show() {
  visible.value = true
  init()
  getOrgList()
}
function orgItemClass(org){
  // return {
  //   'org-item': true,
  //   'org-dept-item': org.type === 'dept',
  //   'org-user-item': org.type === 'user',
  //   'org-role-item': org.type === 'role'
  // }
}
function disableDept(node) {
  return props.type === 'user' && 'dept' === node.type
}
function getOrgList() {
  loading.value = true
  getOrgTree({deptId: nowDeptId.value, type: props.type}).then(rsp => {
    loading.value = false
    nodes.value = rsp.data
    selectToLeft()
  }).catch(err => {
    loading.value = false
    $message.error(err.response.data)
  })
}
function getShortName(name) {
  if (name) {
    return name.length > 2 ? name.substring(1, 3) : name;
  }
  return '**'
}
function searchUser() {
  let userName = search.trim()
  searchUsers.value = []
  loading.value = true
  getUserByName({userName: userName}).then(rsp => {
    loading.value = false
    searchUsers.value = rsp.data
    selectToLeft()
  }).catch(err => {
    loading.value = false
    //$message.error("接口异常")
  })
}
function selectToLeft() {
  let nodes = search.value.trim() === '' ? nodes : searchUsers;
  nodes.forEach(node => {
    for (let i = 0; i < select.length; i++) {
      if (select[i].id === node.id) {
        node.selected = true;
        break;
      } else {
        node.selected = false;
      }
    }
  })
}
function selectChange(node) {
  if (node.selected) {
    checkAll.value = false;
    for (let i = 0; i < select.length; i++) {
      if (select[i].id === node.id) {
        select.splice(i, 1);
        break;
      }
    }
    node.selected = false;
  } else if (!disableDept(node)) {
    node.selected = true
    let nodes = search.value.trim() === '' ? nodes : searchUsers;
    if (!multiple) {
      nodes.forEach(nd => {
        if (node.id !== nd.id) {
          nd.selected = false
        }
      })
    }
    if (node.type === 'dept') {
      if (!multiple) {
        select.value = [node]
      } else {
        select.unshift(node);
      }
    } else {
      if (!multiple) {
        select.value = [node]
      } else {
        select.push(node);
      }
    }
  }
}
function noSelected(index) {
  let nodes = nodes;
  for (let f = 0; f < 2; f++) {
    for (let i = 0; i < nodes.length; i++) {
      if (nodes[i].id === select[index].id) {
        nodes[i].selected = false;
        checkAll.value = false;
        break;
      }
    }
    nodes = searchUsers;
  }
  select.splice(index, 1)
}
function handleCheckAllChange() {
  nodes.forEach(node => {
    if (checkAll) {
      if (!node.selected && !disableDept(node)) {
        node.selected = true
        select.push(node)
      }
    } else {
      node.selected = false;
      for (let i = 0; i < select.length; i++) {
        if (select[i].id === node.id) {
          select.splice(i, 1);
          break;
        }
      }
    }
  })
}
function nextNode(node) {
  nowDeptId.value = node.id
  deptStack.push(node)
  getOrgList()
}
function beforeNode() {
  if (deptStack.length === 0) {
    return;
  }
  if (deptStack.length < 2) {
    nowDeptId.value = null
  } else {
    nowDeptId.value = deptStack[deptStack.length - 2].id
  }
  deptStack.splice(deptStack.length - 1, 1);
  getOrgList()
}
function recover() {
  select.value = []
  nodes.forEach(nd => nd.selected = false)
}
function selectOk() {
  $emit('ok', Object.assign([], select.map(v => {
    v.avatar = undefined
    return v
  })))
  visible.value = false
  recover()
}
function clearSelected(){
  $confirm('您确定要清空已选中的项?', '提示', {
    confirmButtonText: '确定',
    cancelButtonText: '取消',
    type: 'warning'
  }).then(() => {
    recover()
  })
}
function close() {
  $emit('close')
  recover()
}
function init() {
  checkAll.value = false;
  nowDeptId.value = null;
  deptStack.value = [];
  nodes.value = []
  select.value = Object.assign([], props.selected)
  selectToLeft()
}

defineExpose({
  show
})


</script>

<style lang="less" scoped>

@containWidth: 278px;
@theme-primary: #1890FF;
.candidate, .selected {
  position: absolute;
  display: inline-block;
  width: @containWidth;
  height: 400px;
  border: 1px solid #e8e8e8;
}

.picker {
  height: 402px;
  position: relative;
  text-align: left;
  .candidate {
    left: 0;
    top: 0;

    .role-header{
      padding: 10px !important;
      margin-bottom: 5px;
      border-bottom: 1px solid #e8e8e8;
    }

    .top-dept{
      margin-left: 20px;
      cursor: pointer;
      color:#38adff;
    }
    .next-dept {
      float: right;
      color: @theme-primary;
      cursor: pointer;
    }

    .next-dept-disable {
      float: right;
      color: #8c8c8c;
      cursor: not-allowed;
    }

    & > div:first-child {
      padding: 5px 10px;
    }

  }

  .selected {
    right: 0;
    top: 0;
  }

  .org-items {
    overflow-y: auto;
    height: 310px;

    .el-icon-close {
      position: absolute;
      right: 5px;
      cursor: pointer;
      font-size: larger;
    }
    .org-dept-item {
      padding: 10px 5px;

      & > div {
        display: inline-block;

        & > span:last-child {
          position: absolute;
          right: 5px;
        }
      }
    }

    .org-role-item {
      display: flex;
      align-items: center;
      padding: 10px 5px;
    }

    /deep/ .org-user-item {
      display: flex;
      align-items: center;
      padding: 5px;

      & > div {
        display: inline-block;
      }

      .avatar {
        width: 35px;
        text-align: center;
        line-height: 35px;
        background: @theme-primary;
        color: white;
        border-radius: 50%;
      }
    }

    /deep/ .org-item {
      margin: 0 5px;
      border-radius: 5px;
      position: relative;

      .el-checkbox {
        margin-right: 10px;
      }

      .name {
        margin-left: 5px;
      }

      &:hover {
        background: #f1f1f1;
      }
    }
  }
}

.selected {
  border-left: none;

  .count {
    width: calc(@containWidth - 20px);
    padding: 10px;
    display: inline-block;
    border-bottom: 1px solid #e8e8e8;
    margin-bottom: 5px;
    & > span:nth-child(2) {
      float: right;
      color: #c75450;
      cursor: pointer;
    }
  }
}

/deep/ .el-dialog__body {
  padding: 10px 20px;
}

.disabled{
  cursor: not-allowed !important;
  color: #8c8c8c !important;
}

::-webkit-scrollbar {
  float: right;
  width: 4px;
  height: 4px;
  background-color: white;
}

::-webkit-scrollbar-thumb {
  border-radius: 16px;
  background-color: #efefef;
}
</style>
